论文部分内容阅读
放大转发中继网络中,传统的基于广义ABBA(GABBA)码的分布式空时编码方案没有利用传输过程中的信道状态信息(CSI),针对此问题提出了一种基于GABBA码的分布式空时编码改进方案.在该方案中,接收端由CSI得到本次传输的反馈信息1,个中继节点根据此反馈信息对该支路原发送信号进行预处理,从而减小了信道相关性,提高了系统的可靠性.理论分析和仿真结果显示,与已有结果相比,所提方案只需要以1个比特的反馈量为代价,就能使系统的误比特率性能获得显著改善.
In the amplification and forwarding relay network, the traditional distributed space-time coding scheme based on GABBA code does not utilize the channel state information (CSI) in the transmission process. A distributed GABBA-based distributed null scheme is proposed for this problem. In this scheme, the receiving end obtains the feedback information 1 of this transmission from the CSI, and the relay nodes pre-process the original transmission signal of the branch according to the feedback information, so as to reduce the channel correlation, The reliability of the system is improved.The theoretical analysis and simulation results show that compared with the existing results, the proposed scheme only needs the cost of one bit feedback, which can improve the system’s bit error rate performance significantly.